As of now, you'll get about 30 fps in high/ultra settings.
about 40-50 in medium
Battlefield 4 is still constantly updating to utilize more cuda cores for gpus and cpu. As battlefield 3 did, it's unstable in the beginning of it's release (first half year of release)
I have the gtx 670 oced to 1100 MGhz and memory +600
at 60c full load
i7-4770k 3.5Ghz oced to 4.2 @70c full load
I get about 40-60fps
at high/ultra settings